add isEmpty method to Store. AGDROID-45
Inital push support
dropping google-play-services from the maven-android-sdk-deployer workaround
Updating the code to use the GCM style publishied at IO 2013.

Previously, the code was based on the older GCM libraries.
Added licenses, cleaned up warnings, etc
Adding a default notifier option
updated compatibility-v4 lib version
avoid more warnings from Android libraries
Add HTTP Basic to Push
Renamed mobileVariantId and mobileSecret
Improved varianteID JavaDoc
Adding JavaDoc MsgHandler interface
minor formating
Removing the ability to set a broadcast receiver at runtime.
Formatting and import cleanup
Updating Android dependency versions
Rename the GCM message receiver
fixing formatting issue
For AGPUSH-229 renaming the 'mobileOperatingSystem' to 'operatingSystem'
Formatting fixes